I have never seen Vinz re-dome LEDs. He has a method of removing th green tint after de-doming though (he calls it diamond treating).
There are some modders here who build hundreds of lights per year with dedomed LEDs. I have never read a single post in the last 5-6 years where somebody measured an actual loss of performance of time.
I also has Osram Oslon LCW CQAR.CC-MR-6L-L2 (from pargos-shop, 2 orders), and use it in 3 my flashlights with TIR-optics.
And I also can say : no any grinnich .
Perfect white color, slightly warm light, ~3900-4000K (color rendering slightly nicer, than in 2 my FC mkIV HiCRI Zebralight’s).
Yes, all hiCri led has lower low lm/w efficiency, that ordinary led’s, and these Osram Square series isn’t a “lumen champions”, but has excellent color rendering and (imho) tint (CQAR.CC 4000K 6L group).
If you prefer samsung 351D tint - it’s your choice.
There’s a minimum order to meet, hence the last group buy. But I really don’t know how much 219Bs left in the warehouse. I have to check back to Nichia. I personally don’t want to stock them anymore. If you really have to use it then PM me.
Single E21A is the way to go, it’s very similar to 219B in performance and output. Rosy tint is another thing though…
EDIT: Yes, officially discontinued. We got the last batch from last year stock, you can see it from the bin labelling.